High intensity interval training

High intensity interval training is a well-supported method for boosting fitness, with proper recovery.

Recommended

For cardiovascular fitness.

Sourced from the doctors, PhDs and clinicians behind Entrain. Updated

The strongest voice

“you would probably want to do some type of stress test to say that you don't have ischemia before saying it's good to go for doing interval”

a board-certified cardiologist · source video · 00:03:00

In their own words

One faithful sentence per source, linked to the moment it was said; quiet chips mark where money is involved.

a licensed acupuncturist and clinician-educator recommend
“HIIT sessions with 10 to 45 seconds all out and 1 to 2 minutes rest improve performance but require recovery days.”

a licensed acupuncturist and clinician-educator · source video · 00:11:00

a former research biochemist conditional
“Excessive training volume and intensity without adequate recovery can increase stress and hinder fat loss.”

a former research biochemist · source video · 00:06:30

a registered holistic nutritionist recommend
“HIIT is effective for weight management and endurance with short bursts of high intensity followed by rest.”

a registered holistic nutritionist · source video · 00:04:00

a performance scientist with a psychology PhD neutral
“HIIT is enjoyable and effective but less efficient than SIT for fat loss and time commitment.”

a performance scientist with a psychology PhD · Instagram reel

a performance scientist with a psychology PhD conditional
“HIIT is a good alternative for those not suited for maximal or supramaximal efforts.”

a performance scientist with a psychology PhD · Instagram reel · 00:00:00

a Stanford-educated anesthesiologist recommend
“Sprint or high intensity interval training builds type 2 'fast twitch' muscle fibers in women.”

a Stanford-educated anesthesiologist · Instagram reel

Worth discussing with your GP, especially if you take medication or are pregnant. Entrain describes what is publicly taught; it does not prescribe.

Natural environment exposure

Time in nature is a simple, effective way to support mental and physical well-being.

Strong consensus

“spending time in the natural world or or having opportunities to kind of commune with other species or spend time in restorative natural environments is not something we can do without”

a licensed acupuncturist and clinician-educator · source video · 00:14:32

Zone 2 cardio

Zone 2 cardio is foundational for heart, energy, and mitochondrial health.

Strong consensus

“Exercise is one of the best ways is blood flows across the glycoalics that sheer stress releases nitric oxide. Zone two training is where I would start.”

a board-certified cardiologist · source video · 00:12:30

Sweating

Sweating through movement or heat supports natural detoxification and can help with overall vitality.

Strong consensus

“We remove or deplete deuterium by sweating pooing weeing and also sunlight it'll deplete deuterium as well”

a molecular biology PhD · source video · 00:16:50